How are sites in the Stack Exchange network, including Stack Overflow, officially branded? How are their names abbreviated? What conventions should be used in the FAQ?

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  • Does this really need a FAQ?
    – asheeshr
    Commented Mar 7, 2014 at 1:51
  • @AsheeshR given this question was asked today? Yes. Commented Mar 7, 2014 at 1:53
  • The answer is just a link to the Trademarks page.
    – asheeshr
    Commented Mar 7, 2014 at 1:55

2 Answers 2


Casing, spacing and other branding/trademark guidance can be mined and further explored at Guidelines for the Use of the Stack Exchange Trademarks.

The page is accessible through the "legal" link in the footer of every Stack Exchange network page.

  • It's important to note that the SO logo is NOT licensed under cc-wiki. "site design / logo © 2011 stack overflow internet services, inc; user contributions licensed under cc-wiki with attribution required"
    – Earlz
    Commented Feb 7, 2011 at 19:20
  • Yup, that's why I said if you use the Stack Overflow logo, it should probably fall under Fair Use: en.wikipedia.org/wiki/Fair_use Commented Feb 7, 2011 at 19:46

You really should go read the legalese (specifically, the last paragraph). But in case you won't or can't, here's a quick summary:

  • The company is legally named Stack Exchange, Inc. It uses the brand name Stack Overflow.

  • The websites are named Stack Overflow, Super User, Cross Validated, User Experience, etc. That's a U+0020 SPACE separating multiple words.

  • All of those and more are Stack Exchange sites (separated by U+0020 SPACE; also note capitalisation).

  • Those sites live on the Stack Exchange Network (all words initial-caps, separated by U+0020 SPACE).

  • You can't name an app Stack Exchange XYZ or Stack Overflow XYZ. You may, however, call it Stack XYZ, XYZ Overflow, or something like that. Usually. Use common sense.

    1. If it could easily be confused with something official, you probably shouldn't use it.

    2. When in doubt, check with Stack Exchange Inc.

  • 1
    It should perhaps be noted explicitly that not for all Stack Exchange sites it is Stack Exchange Inc. that is the authority to ask for usage of the name. An example, I do not know if it the only one, is MathOverflow, which is also spelled without space. See meta.mathoverflow.net/questions/969/who-owns-mathoverflow for information on who owns MathOverflow
    – quid
    Commented Mar 6, 2014 at 22:50
  • 1
    @quid Oh, I was going to put that in, but forgot about it during drafting... (edit) There, done. Commented Mar 6, 2014 at 22:51
  • This is slightly outdated: the company is no longer Stack Exchange inc. rather it's gone back to StackOverflow
    – Möoz
    Commented Feb 14, 2016 at 22:31
  • 1
    @Mooz The legal page hasn't changed... Commented Feb 19, 2016 at 11:30
  • Regarding that last point...Are Stack Apps (such as browser plugins meant to be used on Stack Exchange) allowed to have "Stack Exchange" in their names? I made an add-on called "Stack Exchange Downvoter." Is that an illegal use of the trademark?
    – clickbait
    Commented Jun 26, 2018 at 16:06

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